Systems, methods and computer program products for generating and displaying various user interfaces for configuring one or more call handling rules associated with managing virtual PBX services rendered at an extension are described. The user interfaces can be used to configure virtual PBX services for a single- or multi-extension environment. The virtual PBX services can provide, for example, a main number, and calls made to the main number can be managed according to one or more sets of call handling rules associated with the virtual PBX services and which can be configured through the user interfaces. The user interfaces can be web-based interfaces accessible through a browser, and can be accessed only after a user or administrator has setup and activated the virtual PBX services.